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Strip more forms of comments from CSS before parsing/inlining. (#2014)

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Handle if ExCSS throws an exception during inlining and attempt to fallback to scoping css instead of inlining.

I still cannot update past ExCSS v4.1.0 else NPEs for common css will be thrown.
This commit is contained in:
Joe Milazzo 2023-05-25 08:29:42 -05:00 committed by GitHub
parent 016cd7448f
commit 4b3bc11589
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 19 additions and 2 deletions
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21
API/Services/BookService.cs
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@ -231,7 +231,16 @@ public class BookService : IBookService
}
styleRule.Text = $"{CssScopeClass} " + styleRule.Text;
}
return RemoveWhiteSpaceFromStylesheets(stylesheet.ToCss());
try
{
return RemoveWhiteSpaceFromStylesheets(stylesheet.ToCss());
}
catch (Exception ex)
{
_logger.LogError(ex, "There was an issue escaping css, likely due to an unsupported css rule");
}
return RemoveWhiteSpaceFromStylesheets($"{CssScopeClass} {styleContent}");
}
private static void EscapeCssImportReferences(ref string stylesheetHtml, string apiBase, string prepend)
@ -396,7 +405,8 @@ public class BookService : IBookService
{
var cssFile = book.Content.Css.GetLocalFileRefByKey(key);
var styleContent = await ScopeStyles(await cssFile.ReadContentAsync(), apiBase,
var stylesheetHtml = await cssFile.ReadContentAsync();
var styleContent = await ScopeStyles(stylesheetHtml, apiBase,
cssFile.FilePath, book);
if (styleContent != null)
{
@ -1263,6 +1273,13 @@ public class BookService : IBookService
body = Regex.Replace(body, @"[\n\r]+\s*", string.Empty, RegexOptions.None, Parser.RegexTimeout);
body = Regex.Replace(body, @"\s+", " ", RegexOptions.None, Parser.RegexTimeout);
body = Regex.Replace(body, @"\s?([:,;{}])\s?", "$1", RegexOptions.None, Parser.RegexTimeout);
// Handle <!-- which some books use (but shouldn't)
body = Regex.Replace(body, "<!--.*?-->", string.Empty, RegexOptions.None, Parser.RegexTimeout);
// Handle /* */
body = Regex.Replace(body, @"/\*.*?\*/", string.Empty, RegexOptions.None, Parser.RegexTimeout);
try
{
body = body.Replace(";}", "}");